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Principle of color sensor

2014-11-28 08:06  
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This article is a color sensor principle discussed. By convention, in order to better grasp the principles you are, we recommend you to combine text read schematics. Blue, green and red glass plates (filters) are fixed in LDR1 front, LDR3 LDR2 and respectively. When the reflected light from the object falls gadgets, colored filter glass plates determine the LDRs will be triggered.  Circuit  use only 'and' Gates and "no" Gates. When a primary colored light falls on this system, the glass plate corresponds to this particular color will allow light to pass through. But the other two glass plates will not allow any light to pass through. Therefore, only a long distance relationship can trigger and gate output corresponds to deposit ratio will become logic 1 to indicate which color it is. Similarly, when a two colored light falls on this system, the two major glass plates corres - puddles mixed color will allow the light to pass through, the rest will not allow any light to pass through it. Results of the two long-distance love will trigger and gate output corresponding to these will become logic 1 to indicate which color it is. When all of the long-distance love can cause or trigger yet, you will see the white and black light indications respectively. The following problems may be carefully noted:
1. Potmeters VR1, VR2 and VR3 may be used to adjust the sensitivity of the long-distance love.
2. Common ends LDRs should be connected to the positive supply.
3. Use good quality optical filters.
If you are a first reading on this principle, we recommend that you carefully read several times in order to better fully grasp this simple but effective circuit.

Color sensor

Color sensor

VN:D [1.6.9_936]


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